Comparison of disinfectant solutions effect on speed of Cobalt - Chromium Alloy corrosion

Corrosion may be a consequence of disinfecting and cleansing of partial denture chromium – cobalt frameworks using chemical disinfectants and cleansers. There is short information in literature about the effect of these solutions, in comparison with each other, on the corrosion rate of chromium – cobalt alloy. The present study was designed to compare corrosion rate of the chromium – cobalt alloy in disinfecting solutions.
Material & In this experimental in-vitro study, corrosion rates of 35 chromium-cobalt immersed in7disinfecting solutions were determined. As a complementary test , samples were immersed in two groups of solutions which showed the least and the most corrosion rates as measured by electrochemical tests for a period of one week and their surface and also surface of one untreated control sample was photographed under a scanning electron microscope . Corrosion rates obtained, were statistically analyzed using variance analysing test and multiple comparisons were made using Tukey HSD and Dunnett tests.
The corrosion rates of chromium cobalt sample in the studied solutions from the highest to lowest , were : Sodium Hypochlorite 1%, Fittydent 1 tab/250ml , Micro 10 5% , Korsolex Plus 3% , Deconex 53 Plus 2% . Corrosion rates were statistically different in the studied solutions (P The present study indicated that Sodium Hypochlorite at the concentration of 1% or more for the purpose of disinfection and cleansing of chromium-cobalt not be used.